April in Deventer averages a daily high of 14.6°C with nights around 3.5°C. Expect roughly 10.6 wet days totalling 41mm. Generally workable, with some weather to plan around.
Across the year, the best time to visit Deventer is May–September.
Based on HEINO, NL (20.9km), 1995–2024. 30 years of April data.